Journal of Medical Physics
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TECHNICAL NOTE
Year : 2011  |  Volume : 36  |  Issue : 4  |  Page : 230-233

Effect of surface waves on radiotherapy dosimetric measurements in water tanks


RadAmerica II, LLC, 9501 Franklin Square Dr. Baltimore, MD 21237, Baltimore, USA

Correspondence Address:
Mohammad Bakhtiari
RadAmerica II, LLC, 9501 Franklin Square, Dr. Baltimore, MD 21237, Baltimore
USA
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Source of Support: None, Conflict of Interest: None


DOI: 10.4103/0971-6203.89972

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The effect of surface waves, generated by moving the scanning arms in water phantoms, on radiation dosimetry is studied. It is shown that in large water tanks, high arm speeds can result in dosimetric errors of up to 5%. The measurements that are started after damping the water waves can result in about a 50% improvement in accuracy of measurements. It is shown that the water surfaces at the start of the measurements have high fluctuations that transform to a steady phase by elapsing time.


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